EP1522829A2 - Dispositif de détection de niveaux de liquide - Google Patents
Dispositif de détection de niveaux de liquide Download PDFInfo
- Publication number
- EP1522829A2 EP1522829A2 EP04292355A EP04292355A EP1522829A2 EP 1522829 A2 EP1522829 A2 EP 1522829A2 EP 04292355 A EP04292355 A EP 04292355A EP 04292355 A EP04292355 A EP 04292355A EP 1522829 A2 EP1522829 A2 EP 1522829A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- float
- liquid
- tube
- level
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 70
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 description 14
- 239000012535 impurity Substances 0.000 description 11
- 238000004378 air conditioning Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000012080 ambient air Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000004064 dysfunction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
- G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
- G01F23/72—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means
- G01F23/74—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means for sensing changes in level only at discrete points
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/30—Condensation of water from cooled air
Definitions
- the present invention relates to a device for detecting liquid levels.
- Such a device is intended for use in groups refrigerators, boilers, or air-conditioning installations in which the liquid, or condensate, which results from the condensation of the water vapor present in the ambient air that is cooled, is recovered in a bin.
- the liquid, or condensate which results from the condensation of the water vapor present in the ambient air that is cooled, is recovered in a bin.
- it is necessary to evacuate regularly the recovered liquid, on the one hand to avoid the overflow recovery tank, and on the other hand to limit the risks of bacterial contamination related to the stagnation of the liquid in this tank.
- FIG. 1 An example of an air conditioning installation equipped with a device known level of liquid level detection, is shown schematically Figure 1.
- the installation 1 comprises an exchanger 2 inside which circulates a refrigerant, a fan 3 for putting the ambient air in motion to bring it into contact with the exchanger 2, and a tank of recovery of liquid 4 disposed under the exchanger.
- a refrigerant for putting the ambient air in motion to bring it into contact with the exchanger 2
- a tank of recovery of liquid 4 disposed under the exchanger.
- the installation comprises a hydraulic pump 9 associated with a detection device of known liquid levels 6, described in the patent application of French invention, published under the number FR 2 716 715.
- This detection device 6 comprises a reservoir 20 which communicates, on the one hand with the tray 4 via a conduit 5 and on the other hand with the hydraulic pump 9 via a suction duct 10. Inside the tank find a float 23 free to move vertically following the level of the liquid in the tank. This float 23 also contains a magnet 24.
- switches 31a, 31b and 31c In the vicinity of the path of the magnet, there are three switches with flexible blades 31a, 31b and 31c each sealed in a bulb and fixed all three outside a tank wall 20. These switches type “reed switch” are likely to close under the effect of the field magnet of the magnet 24.
- the switches 31a and 31b are connected via two electrical circuits 7a and 7b to the control 8 of the hydraulic pump 9.
- the switch 31c is connected by via an electrical circuit 12 to the control of a system alert 13.
- the height of liquid inside the tank 20 is between Ma and Mi levels.
- the magnet 24 rises to the height of the switch 31b which closes.
- the control device 8 detects the closing of the electrical circuit 7b and operates the pump 9 so as to suck up the liquid by the suction duct 10.
- the pump 9 then foams generally this liquid to a sewage piping (not shown).
- the liquid height goes down to the Mi level, so that the magnet reaches the height of the switch 31a which closes.
- the electrical circuit 7a is then closed and the control device 8 stops the operation of the pump 9.
- This type of known liquid detection device presents however drawbacks related to impurities (dust, fibers, etc.) initially present in the environment of installation 1 and which is found in the liquid recovered in tray 4.
- impurities dust, fibers, etc.
- the present invention proposes to solve the disadvantages mentioned above by means of a new device for detecting levels of liquid.
- the present invention provides a liquid level sensing device, comprising a suitable reservoir to communicate with a liquid recovery tank and with a pump this device being intended to be connected, on the one hand, to the control of the hydraulic pump so as to put the pump into operation when the liquid height in the tank reaches a maximum level allowed Ma and to stop the operation of the pump when the liquid height drops to a minimum level Mi and, on the other hand, to control an alert system so as to activate this system when the liquid height reaches a safety level Ns higher than the maximum authorized level Ma, characterized in that includes two optical sensors located at the minimum levels Mi and maximum allowed Ma and connected to the control of the pump, a float likely to be lifted by the liquid, a magnet carried by said float, a reed switch connected to the system control alarm, located in the vicinity of security level Ns, in the vicinity of path of said magnet, and capable of being actuated by the field of the latter, and means for maintaining the float at above the maximum allowed level Ma.
- optical sensors is a simple solution economic to detect the liquid height at the Mi and Ma levels, and allows to get rid of the presence of the float at these levels.
- the holding means in the normal operating mode of the device, ie when the liquid level varies between levels Mi and Ma, the float is out of reach for the liquid and impurities stagnant in this liquid, so that its fouling is impossible.
- the float in case of malfunction of the pump or the level sensor Ma, the float will always be able to follow the rise of the liquid, this which will activate the alert system.
- the presence of a filter between the condensate drain pan and the tank is not essential since the float is no longer likely to become dirty. It is therefore possible to design a device without filter, cheaper to manufacture and which does not have to be cleaned.
- a filter between the tank and the liquid recovery tank may be advantageous to provide for less a filter between the tank and the liquid recovery tank, for avoid the intrusion of impurities that could damage elements the device, or even the pump located downstream of the latter.
- a coarse filter having openings large enough to allow passage impurities that can be pumped, may be suitable. This type of filter fouling less quickly than the fine filters used to limit the fouling of the float in the known devices, the frequency to which it needs to be cleaned is lower, and maintenance costs are reduced.
- At least one filter having substantially the shape of a comb, this type of filter having a structure simple and the advantage of being able to be achieved, by molding for example, in one piece with a body part of the device.
- the device comprises float guide means which comprise for example a substantially vertical tube passing through a bore of the float.
- float guide means comprise for example a substantially vertical tube passing through a bore of the float.
- sufficient clearance is provided between the tube and the float to allow the float to slide along the tube when this last is slightly inclined relative to the vertical. So, during the setting up the device, we admit that the tube can be slightly inclined, ie form an angle of 15 ° maximum with the vertical. This tolerance makes it easier to install the device and to guarantee its good functioning in case of inclination of the tube.
- the float holding means above the maximum permitted level comprise an abutment carried by the tube, removable preferably.
- This stop may comprise at least one protrusion formed on the wall outside the tube, any annular part or washer, split or not, preferably having elastic properties, suitable for lodging in a peripheral annular groove formed on the tube, or by a rod through a bore in the tube.
- said stop comprises an O-ring elastic, able to be engaged inside an annular groove peripheral formed on the tube.
- the device 106 shown in FIGS. 2, 3 and 4 is intended to to be integrated in place of a device 6 of known type, in a air conditioning installation 1 similar to that previously described and shown in Figure 1. Therefore, the device 106 is intended for communicate with the liquid recovery tank 4 and the pump 9, and to be connected to the control of the pump 9 as well as to that of the warning system 13.
- the device 106 of the invention comprises a lower part represented in FIG. 2, and a part shown in Figure 3. These two parts are intended to be assembled, as shown in FIG.
- the lower part comprises the body 118 which defines a tank 120 likely to communicate with the outside by three openings located in its lower part and prolonged by three connections: an inlet connector 105a and two outlet connectors 110a and 110b.
- the connection 110a is adjacent to the connection 105a while the connection 110b is protruding on the opposite side to the connector 105a.
- the inlet fitting 105a is intended to be engaged in the exhaust duct 5, so that the liquid recovered in the tray 4 can flow into the tank 120 according to the arrow E.
- the bottom of the tray 4 may be more or less inclined, even present a frustoconical shape with a central hole, allowing the evacuation of the recovered liquid, and the tank 4 is placed higher or at the same height as the device 106.
- the outlet connections 110a and 110b are both apt to be engaged in the suction duct 10 so that the liquid can be pumped by the pump 9 according to one of the arrows S.
- only one of the two connections is used, the other being closed by a cap 150. It is indeed interesting to be able to choose the connection that is to be used depending on the relative position of the suction duct 10 with respect to the exhaust duct 5, this position may vary from one air conditioning system to another.
- two filters 140 and 142 are arranged at the inlet of the tank 120, at the connection 105a.
- the first filter 140 has the general shape of a comb with four teeth. These teeth were molded with the body 118.
- the second filter 142 is removable and optional. It is supported by two slides on the edge internal side of the body 118.
- These two filters 140, 142, or the first filter 140 when alone, are intended to prevent the intrusion of certain impurities present in the liquid recovered in the tray 4, inside the tank 120.
- the distance between the teeth of the filter 140 or the diameter of the openings of the filter 142 are chosen according to the size impurities that we want to filter.
- the upper part of the device 106 comprises a lid 119, a tube 133, a float 123, a seal 130 and a sheath 146.
- the cover 119 has an inner face, an outer face, and on its edge a skirt 119a adapted to cooperate with the upper edge 118a of the body 118, as shown in FIG. upper and lower parts of the device 106 are assembled.
- the tube 133 is made of translucent material, preferably in polymer, it is attached to the lid 119 and protrudes from the side of its face internal. In condition of use of the device 106, the axis of the tube 133 is substantially vertically. This tube 133 has substantially mid-height a peripheral annular groove 136. In addition, this tube 133 is hollow, its horizontal section is circular and is closed at its end lower by a wall 133a. The outer face of this wall 133a is concave, which allows to receive a bump 144 present on the wall of body bottom 118. When the upper and lower parts of the device 106 are assembled, one end of the tube 133 is attached to the 119, and its other end is in support, or touches the 144, so that we are assured of the proper positioning of the tube 133 inside the tank 120.
- the float 123 has the general shape of a ring: its section horizontal is circular, and is traversed vertically in its center by a bore 134.
- a groove is formed on the inner periphery of this float, so as to receive an annular magnet 124.
- the edge inner upper 123a of the float 123 is rounded, or chamfered, the bore 134 has a larger diameter at this level.
- 123a edge, and the edge 123a of the float is preferably elastically deformable.
- overmould float for example expanded polystyrene, around this latest.
- the tube 133 When mounting the device, the tube 133 is first introduced in the bore 134 of the float 123. A game is provided between these two elements 123 and 133, to allow the float 123 to slide along of the tube 133. Then, we pass around the tube 133 an O-ring elastic 130, which is housed partly in the groove 136. This seal 130 forms a stop for the float 123, and limits the displacement of this last along the tube 133.
- two optical sensors 100a and 100b, and a blade switch 131c are disposed within the tube 133, made of translucent material. These three elements are in solidarity with one same support 138 in the form of a plate, housed inside the tube 133.
- the support 138 is first placed inside the tube 133, and translucent material, for example epoxy resin or a polymeric material like polyethylene overmoulding, filling it around the support 138, the tube 133, and the tube 133 is fixed at cover 119.
- the first sensor 100a is located at the minimum level Mi of the liquid inside the tank 120.
- the second 100b is located at the maximum authorized level Ma, and the switch 131c is in the vicinity of the security level Ns, that is to say a little higher than this level of security Ns.
- This slight shift in height is the distance between the waterline and the float 123 of the magnet 124.
- the magnet 124 is at the height of the switch 131c.
- Each optical sensor 100a, 100b comprises a transmitter of light, for example a light-emitting diode, and a light-emitting light, for example a phototransistor.
- a transmitter of light for example a light-emitting diode
- a light-emitting light for example a phototransistor.
- optical sensors can be used as long as they can detect whether the height of the liquid inside the tank 120 reaches or not a certain level. Indeed, the main interest of these sensors is to avoid having use of a float to detect the liquid height at levels Ma and Mi, this float inevitably getting dirty.
- the sensors 100a and 100b are electrically connected through electrical circuits 107a and 107b to the control 8 of the pump 9.
- the switch 131c is connected to the control of the alarm system 13 by means of the circuit 112. All these circuits 107a, 107b and 112 are grouped and passed in the sheath 146 which is solidary cover 119.
- the structure of the device 106 of the invention being well understood, we will now describe how it works.
- the liquid recovered in the tray 4 flows to the tank 120 of the device 106 following the arrow E, and is filtered at the entrance of the tank by a 140 or two 140, 142 filters.
- the liquid height inside the tank increases and reaches the maximum allowed level Ma, at which locates the sensor 100b.
- the latter detects the presence of the liquid at its level, and changes state.
- This change is detected by the command 8 which turns the pump 9 on.
- the liquid contained in the tank 120 is then pumped along one of the arrows S, and the height of decreases to the minimum level Mi, at which the 100a sensor.
- the latter detects the presence of the liquid at its level, and changes state.
- Command 8 detects this change and stops the pump 9.
- the height of the liquid in the tank 120 is thus new power increase.
- the control 8, the pump 9, or the installation of air conditioning 1 the liquid is no longer, or not quickly enough, pumped and the height of liquid increases until reaching the waterline of the float 123.
- the lid 119 is substantially horizontally, so that the tube 133, perpendicular to the latter, is substantially vertically.
- the device 106 is bad installed, that its integration does not make it possible to place the tube 133, that it was jostled by accident, or that the tube 133 has not been positioned correctly inside the device.
- the tube 133 may be slightly inclined with respect to the vertical. So that the float 123 can still slide on the tube 133, irrespective of the inclination of the latter between minus 15 ° in relation to the vertical, a sufficient clearance between the bore 134 of the float 123 and the tube 133.
- the magnet 124 is found at the height of the switch 131c which closes, or opens.
- the closure, or the opening, circuit 112 is then detected by the system control 13 which activates the latter, which allows to warn the user or a maintenance agent the system malfunction, or cut the arrival of refrigerant in the exchanger 2, or to put in shut down the air conditioning system 1.
- the float 123 never being in contact with the liquid in the normal operation of the system, it does not clog and therefore does not have to to be cleaned. In addition, it is not necessary to avoid clogging to filter as much impurity as possible, so that the filter (s) used can be chosen so as to filter only large impurities that could interfere with the operation of the device. These filters more coarse clogging slower than the fine filters used in known devices to limit the fouling of the float, the frequency to which they need to be cleaned is weaker and the maintenance of the device is simplified.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Level Indicators Using A Float (AREA)
Abstract
Description
- un niveau minimum Mi ;
- un niveau maximum autorisé Ma, supérieur au niveau Mi; et
- un niveau de sécurité Ns, supérieur au niveau Ma.
- La figure 1 représente schématiquement un exemple d'installation de climatisation équipée d'un dispositif de détection de niveaux de liquide de type connu ;
- La figure 2 est une vue en perspective de la partie inférieure d'un dispositif de détection de niveaux de liquide selon l'invention ;
- La figure 3 est une vue en perspective de la partie supérieure du dispositif de la figure 2 ; et
- La figure 4 est une vue en coupe de l'ensemble du dispositif représenté figures 2 et 3.
Claims (10)
- Dispositif de détection de niveaux de liquide comprenant un réservoir (120) apte à communiquer avec un bac (4) de récupération de liquide et avec une pompe hydraulique (9), ce dispositif (106) étant destiné à être connecté, d'une part, à la commande (8) de la pompe hydraulique (9) de manière à mettre la pompe en fonctionnement lorsque la hauteur de liquide dans le réservoir (120) atteint un niveau maximum autorisé (Ma) et à arrêter le fonctionnement de la pompe (9) lorsque la hauteur de liquide redescend à un niveau minimum (Mi) et, d'autre part, à la commande d'un système d'alerte (13) de manière à activer ce système lorsque la hauteur de liquide atteint un niveau de sécurité (Ns) supérieur au niveau maximum autorisé (Ma), caractérisé en ce qu'il comprend deux capteurs optiques (100a, 100b) situés aux niveaux minimum (Mi) et maximum autorisé (Ma) et connectés à la commande (8) de la pompe (9), un flotteur (123) susceptible d'être soulevé par le liquide, un aimant (124) porté par ledit flotteur, un interrupteur à lames (131c) connecté à la commande du système d'alarme (13), situé au voisinage du niveau de sécurité (Ns), au voisinage du trajet dudit aimant (124), et susceptible d'être actionné par le champ magnétique de ce dernier, et des moyens (130) pour maintenir le flotteur (123) au dessus du niveau maximum autorisé (Ma).
- Dispositif selon la revendication 1, caractérisé en ce qu'il comprend des moyens de guidage du flotteur (123).
- Dispositif selon la revendication 2, caractérisé en ce que les moyens de guidage du flotteur comprennent un tube (133) sensiblement vertical traversant un alésage (134) du flotteur (123).
- Dispositif selon la revendication 3 caractérisé en ce qu'un jeu suffisant est prévu entre le tube (133) et le flotteur (123) pour permettre au flotteur de coulisser le long du tube lorsque ce dernier est légèrement incliné par rapport à la verticale.
- Dispositif selon la revendication 3 ou 4, caractérisé en ce que les moyens de maintien du flotteur (123) au dessus du niveau maximum autorisé (Ma) comprennent une butée (130) portée par ledit tube (133).
- Dispositif selon la revendication 5, caractérisé en ce que ladite butée comprend un joint torique élastique (130) apte à être engagé dans une rainure annulaire périphérique (136) ménagée sur ledit tube (133).
- Dispositif selon l'une quelconque des revendications 3 à 6 caractérisé en ce que ledit tube (133) est réalisé en matière translucide, les deux capteurs optiques (100a, 100b) et l'interrupteur à lames (131c) étant disposés à l'intérieur dudit tube (133).
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que les deux capteurs optiques (100a, 100b) et l'interrupteur à lames (131c) sont solidaires d'un même support (138).
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce qu'il comprend au moins un filtre (140, 142) disposé entre le réservoir (120) et le bac (4) de récupération de liquide.
- Dispositif selon la revendication précédente caractérisé en ce que ledit filtre (140) a sensiblement la forme d'un peigne.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0311690A FR2860589B1 (fr) | 2003-10-06 | 2003-10-06 | Dispositif de detection de niveaux de liquide |
FR0311690 | 2003-10-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1522829A2 true EP1522829A2 (fr) | 2005-04-13 |
EP1522829A3 EP1522829A3 (fr) | 2006-05-31 |
Family
ID=34307464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04292355A Withdrawn EP1522829A3 (fr) | 2003-10-06 | 2004-10-05 | Dispositif de détection de niveaux de liquide |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1522829A3 (fr) |
FR (1) | FR2860589B1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2166317A1 (fr) | 2008-09-16 | 2010-03-24 | Sauermann Industrie S.A. | Dispositif de pilotage d'une pompe de relevage de condensats |
CN109748355A (zh) * | 2019-01-22 | 2019-05-14 | 杭州云欧数控机械有限公司 | 一种可测量油层厚度的油水分离系统 |
CN113639821A (zh) * | 2021-08-09 | 2021-11-12 | 中国北方稀土(集团)高科技股份有限公司 | 混合澄清萃取器故障判断装置及故障判断方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112691479B (zh) * | 2020-05-11 | 2022-06-24 | 青岛海尔空调器有限总公司 | 具有提示功能的水洗空气装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2694171A (en) * | 1953-01-26 | 1954-11-09 | Julian A Campbell | Electric motor system for liquid level control |
GB1380019A (en) * | 1973-05-17 | 1975-01-08 | Parker Engineered Chemicals | Water treatment system |
US5305779A (en) * | 1991-08-08 | 1994-04-26 | Izaguirre Albert L | Method, system, and apparatus for operating large power generating stations with improved environmental protection measures |
FR2716715A1 (fr) * | 1994-02-28 | 1995-09-01 | Sauermann Ind | Dispositif de détection de niveaux de liquide dans un bac. |
-
2003
- 2003-10-06 FR FR0311690A patent/FR2860589B1/fr not_active Expired - Fee Related
-
2004
- 2004-10-05 EP EP04292355A patent/EP1522829A3/fr not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2694171A (en) * | 1953-01-26 | 1954-11-09 | Julian A Campbell | Electric motor system for liquid level control |
GB1380019A (en) * | 1973-05-17 | 1975-01-08 | Parker Engineered Chemicals | Water treatment system |
US5305779A (en) * | 1991-08-08 | 1994-04-26 | Izaguirre Albert L | Method, system, and apparatus for operating large power generating stations with improved environmental protection measures |
FR2716715A1 (fr) * | 1994-02-28 | 1995-09-01 | Sauermann Ind | Dispositif de détection de niveaux de liquide dans un bac. |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2166317A1 (fr) | 2008-09-16 | 2010-03-24 | Sauermann Industrie S.A. | Dispositif de pilotage d'une pompe de relevage de condensats |
US8397525B2 (en) | 2008-09-16 | 2013-03-19 | Sauermann Industrie | Device for controlling a condensate lift pump, and corresponding capacitive detector and system |
CN109748355A (zh) * | 2019-01-22 | 2019-05-14 | 杭州云欧数控机械有限公司 | 一种可测量油层厚度的油水分离系统 |
CN113639821A (zh) * | 2021-08-09 | 2021-11-12 | 中国北方稀土(集团)高科技股份有限公司 | 混合澄清萃取器故障判断装置及故障判断方法 |
Also Published As
Publication number | Publication date |
---|---|
FR2860589B1 (fr) | 2006-02-17 |
FR2860589A1 (fr) | 2005-04-08 |
EP1522829A3 (fr) | 2006-05-31 |
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